GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Aftermarket LED DRL for X164

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Old Aug 16, 2018 | 12:33 PM
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W124, W126, W140, W220, W222, R129
Aftermarket LED DRL for X164

Hey guys. Got a pair of these off the "Bay". I decided to test them before putting them on. I put them straight to a power source (12v Battery), and all they do is a brief flash. They don't stay on. Any ideas what could be wrong? I opened up a case on the site, but trying to see if its something I am missing. I know my ground is good, so that isnt the issue. Changed out the inline fuse too, still the same. Any help is appreciated. Thanks!
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Old Aug 16, 2018 | 06:18 PM
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Originally Posted by nishboo
Hey guys. Got a pair of these off the "Bay". I decided to test them before putting them on. I put them straight to a power source (12v Battery), and all they do is a brief flash. They don't stay on. Any ideas what could be wrong? I opened up a case on the site, but trying to see if its something I am missing. I know my ground is good, so that isnt the issue. Changed out the inline fuse too, still the same. Any help is appreciated. Thanks!
You sure you didn't hook them up backwards?
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Old Aug 16, 2018 | 06:19 PM
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Yeah. Even reversed the polarity and it didn't even flicker.. Maybe a bad ballast?
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Old Aug 16, 2018 | 06:21 PM
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Originally Posted by nishboo
Yeah. Even reversed the polarity and it didn't even flicker.. Maybe a bad ballast?​
LEDs don't exactly have a "ballast". Sometimes they'll have a load resistor to prevent the CAN bus from getting persnickety. So they're pretty much working or not. These sound like not.
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